{
  "manageEntity": {
    "action": "Save",
    "entityId": "584788152",
    "entityType": "Track",
    "nonce": "0xb60b240ca29871b06710f2bcc17536d0b881a88d874efec3538a33f88da95553",
    "signature": "0x653acbdfaf604537cd352390633ca68a39fc495ffa65a250b9a3eec79d7bdf9e2b2113b74a42ceaf92ece6a162069fa8fac91bb096859d73888718527eac2f8b1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}