{
  "manageEntity": {
    "action": "Save",
    "entityId": "191260242",
    "entityType": "Track",
    "nonce": "0x561bb783d515dca697fe22750c312e2517313e48c8197db1601c6d3e81e89140",
    "signature": "0xb73f70a243c47935b9ad19d3e31a3c58b88fb8100be07cabe91e32841baef2ce4f2febdad2f356e23b886c2f9072a0e3e05a21386f9d65af76bc2fbe0e3216151c",
    "signer": "0xC9e4fe89311517E71e968f6DE26A6c075A639F41",
    "userId": "964899801"
  }
}