{
  "manageEntity": {
    "action": "Save",
    "entityId": "181099952",
    "entityType": "Track",
    "nonce": "0xfe1d934e2fcaa0c6a0fcd4fab05e9bec356c45a1ad170e728cb3f90eb83a63f4",
    "signature": "0xa9e443ddeec5ef29c8b9e2bc1922ce0ac0e73d3aae261f01f7a5d79d990fc2aa0d32037150d0881e5cb23f2e2894dc9c40225011d9046a151811787850282f301c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}