{
  "manageEntity": {
    "action": "Save",
    "entityId": "509006",
    "entityType": "Track",
    "nonce": "0x0f682de713fd1992af3081eed55e7494ee4f8780e7fce5094629594156ab20ba",
    "signature": "0x8ea1ec797b61b0f37d4f4bcc7271aad809fb1f7cb2a1f87eeef1a6d36b5badd0341895c6997a412ba4883979cefae8123eee8a21b804e6f7ef975d7d18e26d841c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}